[SmG Dragonrage]

Corki isn't trash tier. He is a very strong adc. He had high burst and good trades making him a lane bully and he does a lot of mixed damage which makes it hard to itemize against. I've played games on corki before where I've done more magic damage than the enemy apc, more physical damage than the enemy adc and more true damage than the other team combined. Also the reason split pushers should be good duelists is because if aren't then they can be easily dispatched by an assassin an thus eleminating the threat. Also split pushing with full wave clear champs is somewhat ineffective because you can never build up waves of creeps because you clear waves too fast for your creeps to keep up. A single wave of creeps with a super minion can actually split push better than a lot of champions can. Also teleport generally isn't used to teleport to a place to start split pushing unless you are trying to get inhibs or inhib/nexus turrets. The teleport is used to come back from split pushing to group with your team.